This is the list of Dungeons & Dragons monsters from products published in 1974–1976, an important element of that role-playing game.[1] This list only includes monsters from official Dungeons & Dragons supplements published by TSR, Inc., not those licensed or unlicensed third party products such as video games or unlicensed Dungeons & Dragons manuals. This list only includes the content from the original 1974 Dungeons & Dragons boxed set, the Greyhawk supplement (1974), the Blackmoor supplement (1975), and Eldritch Wizardry (1976).

The 1974 Dungeons & Dragons boxed set by Gary Gygax and Dave Arneson contained three booklets, including a list of monsters in the booklet "Monsters & Treasure". This booklet contained an index on pages 3–4 featuring statistics about how many creatures of each type of creature appeared per encounter, armor class, how many inches the creature could move on its turn, hit dice, % in lair, and treasure. Pages 5–20 followed with descriptions of each of the monsters, typically consisting of one or more paragraphs. Most of the monsters on this book did not feature an illustration. Also featured are descriptions of humans (bandits, brigands, berserkers, dervishes, nomads, buccaneers, cavemen, and mermen), horses, insects, and other small and large animals.

This first supplement to the Gygax/Arneson boxed set is by Gary Gygax and Rob Kuntz and was printed in 1974. Information is presented in a similar manner as that in the boxed set booklet. Page 33 contains an index of the monsters presented in the book, and pages 34–40 contain descriptions of each monster. Additions and corrections to Vampires and Elementals from the boxed set are included in this book on page 34.

Human-headed, winged lions which are very lawful and very magical. The lammasu was introduced to the game in its first supplement, Greyhawk (1975).[2] They are also lawful, although they have little interest in the conflict between law and chaos. Their innate magical powers let them cast spells as a 7th-level cleric.

This second supplement to the Gygax/Arneson boxed set is by Dave Arneson and was printed in 1975. Information is presented in a similar manner as that in the boxed set booklet. Page 14 contains an index of the monsters presented in the book, and pages 15–24 contain descriptions of each monster.

This third supplement to the Gygax/Arneson boxed set is by Gary Gygax and Brian Blume and was printed in 1976. Information is presented in a similar manner as that in the boxed set booklet. Page 27 contains an index of the monsters presented in the book, and pages 27–40 contain descriptions of each monster. Additions and corrections to several monsters from previous books in the series are included in this book from pages 27–29.